They are only improvements. I mentioned that the design is of Rob!.All pages are only improvements..., but now:

- Input and output with the LDR is a circuit isolated from the rest of the circuit. - The DEPTH control acts only in the LED. - The connection of footswitch is totally different, now cuts the voltage and the guitar is completely isolated from the circuit. - Reverse polarity protection. - Cap filter. - Resistors for LEDs.

Hello! I've been reading this thread with great interest, and I've put together a version of this according to the various schematics on here.

What I've got is this:

LM7555 - a cmos 555 that I haven't seen referred to on this thread

A voltage starve pot to get minimum working voltage - set to about 5k at the moment - to be replaced with a fixed resistor

As I've reduced the value of the input voltage, I will probably remove or reduce the value of the LED limiting resistor(s)

220uF decoupling transistor across +/-

I don't put the LED too close to the LDR - it clicks if you do.

My questions about it are these: 1. I see no limiting resistor on the RATE pot on any of the schematics - so the rate can go so high that the pulses can no longer be heard. The LED looks to be just on. I'm pretty sure the duty cycle will be some way off 50% too. Does anyone use a limiting resistor to cap the top speed of the rate control?

2. Would the (a) circuit shown here from the datasheet which keeps a 50% duty cycle be better? I'd never seen this configuration before. It uses fewer components, so why not use that?

3. I'd like to increase the volume ever so slightly. Some folks mentioned it earlier in the tread. I was thinking of using a simple 2N3904-based buffer (from Beavis Audio) before the input. - has anyone actually added a buffer to theirs?

I finally ended up breadboarding the Tiny Trem circuit and it seems to be working as intended, as long as I use it by itself or in front of other pedals as the first effect in the signal chain...As soon as I connect an overdrive or fuzz before the tiny trem, it seems like the Tiny Trem circuit gets completely ignored, like it gets bypassed or something, cuz you won't even hear the clicking sound in the background...To me it seems like when my distorted signal gets to the input of the LDR it just goes right through the output unaffected by the LDR/LED/555 circuit, since the input and output are connected to the same leg of the LDR on my breadboard...I have no dpdt switch connected at the moment...I'm doing all testing by connecting my overdrive pedals directly into the Breadboarded Tiny Trem circuit...This behavior makes no sense to me, as I've seen this type of effect connected after most pedals and the stuttering is very noticeable on any effect before this, as it should be chop all other effects on and off that are before it....A Tremolo effect should work best around the end of the signal chain, but right now for me it's only working as the first effect in the signal chain.....Does anyone have an idea why this is happening or what my issue is?

I finally ended up breadboarding the Tiny Trem circuit and it seems to be working as intended, as long as I use it by itself or in front of other pedals as the first effect in the signal chain...As soon as I connect an overdrive or fuzz before the tiny trem, it seems like the Tiny Trem circuit gets completely ignored, like it gets bypassed or something, cuz you won't even hear the clicking sound in the background...To me it seems like when my distorted signal gets to the input of the LDR it just goes right through the output unaffected by the LDR/LED/555 circuit, since the input and output are connected to the same leg of the LDR on my breadboard...I have no dpdt switch connected at the moment...I'm doing all testing by connecting my overdrive pedals directly into the Breadboarded Tiny Trem circuit...This behavior makes no sense to me, as I've seen this type of effect connected after most pedals and the stuttering is very noticeable on any effect before this, as it should be chop all other effects on and off that are before it....A Tremolo effect should work best around the end of the signal chain, but right now for me it's only working as the first effect in the signal chain.....Does anyone have an idea why this is happening or what my issue is?

I did Rob's version of the Tiny Trem, and now I did this version...They both work well on their own or as the first effect in your signal chain, but as soon as I turn a distortion or other effect ON connected in front of the Tiny Trem, the Tiny Trem gets completely bypassed and doesn't chop the signal....Has anyone else here realized that the TT is a great little circuit, but it seems like it can't be used at the end of your pedal chain with other effects ON in front of it, which is where you would normally want a Tremolo effect?...I'd like to be able to get a strong choppy killswitch stutter with a distortion in front of the TT, but the TT just gets bypassed...If I connect the TT first in the chain, then the effect is somewhat noticeable with other pedals after it, but the chopping on and off effect isn't very intense...Anyone know of a simple way to fix this issue?